Massage device.



H. WIKING & B. J. BBNGTSSON.

MASSAGE DEVICE.

APPLICATION FILED JUNE 26, 1909.

Patented Dec. 7, 1909.

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HENRIK WIKING, or eorrnnsonc, AND BROR JOHANNES BENGTSSON, or KALLERED, swEnEN- MASSAGE DEVICE.

Specification of Letters Patent.

Application filed June 26, 1909. Serial No. 504,493.

To all whom it may concern:

Be it known that we, HENRIK WIKING and Bnon JoHANNEs BENGTSSON, citizens of Sweden, residing, respectively, at Gottenborg and Kallered, Sweden, have invented new and useful Improvements in Massage Devices, of which the fol-lowing is a specification. I

This invention relates to improvements in massage devices.

The invention consists of two weights which are eccentrically mounted on a common turning axis and rotate in opposite directions with equal revolving velocity so that the two weights always pass by each other in their rotation.

In the accompanying drawing Figure 1 is a side view, partly in section of the device. Fig. 2 is a front View of the same, also partly in section. Fig. 3 is the device shown above. Fig. 4 is an elevation of a detail, showing a regulator of the vibrating power, and Fig. 5 an end view of the same detail. Fig. 6 is in decreased scale the apparatus with its handle in another position than in Figs. 1 and 2.

At the end of a handle 2 is fixed a shaft 1 at right angles to the handle. Two weights 3, 4 are mounted on the shaft 1 in such a way that the center of gravity of each one lies outside the shaft and that the weights can be swung around the shaft in opposite directions to each other. For the latter pur pose those parts of the wei hts, which surround the shaft 1 are shape as bevel-wheels 5, 6, which are geared with a common bevelwheel 7, placed between the wheels 5, 6 on a shaft 8 which is rotatable, mounted in the hollow handle 2. Said shaft 8 is in the rear end provided with a worm 10, engaging with a worm wheel 9, which can be revolved by a crank, in order to bring the shaft 8 and thus the weights 3, 4 in a rapid rotation. The means for transmitting motion from the crank 12 to the weights 3, 4 may be varied in several ways, and we do not claim especially the same. The weights and their gearing devices are covered by a cylindrical shell 13, fixed to the handle 2 so as to be easy to remove for inspection of the moving parts. In order to vary the action of the apparatus automatically the weights 3, 4 are not fixed directly on the shaft '1 but by means of a regulating device, shown in Figs. 4 and 5. From the hub of each weight on the shaft 1 project in opposite directions two arms 14, 16, the arm 14 being passed through a hole in the weight so that the adjacent weight can be moved along said arm; the arm 16 is surrounded by a spiral spring 15 which acts against the hub as well as a bracket 17, formed for instance by a double bent plate 18, the ends of which are fixed to the weight. In order that the weights may not turn around their arms 14, said arms, as well as the corresponding holes in the weights preferably have a square section, as shown by Fig. 5.

From the cylindrical surface of the shell 13 projects an arm 20, the outer end of which is provided with a ball or button 21, of suitable type. This arm can be placed in different inclinations in regard to the handle 2 by moving the same along the cylindrical surface of the shell 13. For this purpose the inner end of the arm penetrates the shell through a slit 22 and is inside the shell provided with a head 19 and outside with a wing nut 23. By slacking the nut 23 the arm 20 can be swung to an arbitrary position and then fastened by tightening up the nut. The slit 22 mustbe arranged parallel with the revolving planes of the weights and so that the arm 20 can be fixed in any arbitrary inclination to the handle 2 between 90 and 180 degrees. By placin the arm 20 at right angles to the handle 2 (Fig. 1) a hammering motion is attained, and by placing same in the length of the handle (Fig. 2) no hammering but a rubbing motion is afforded. If the arm 20 is fixed in any arbitrary position between these two limits any combination of the hammering and the rubbing motion may be obtained. When increasing the swinging velocity of the weights a little over the normal one, the centrifugal force gains over the strain of the spiral springs 15 and the weights are pushed out on the arms 14, re moving their center of gravity farther away from the turning axis, thus increasing the vibrating motion in a higher degree than the merely increasing of the revolution would afford if the weights were fixed.

To be able to reach some parts of the human body it may sometimes be suitable to get the handle 2 bent out from the straight line shown by Figs. 1 and 2. For this purpose the lower part 24 of the handle may be loosely fixed to the other part and constructed so that it can be fastened in any arbitrary inclination, for instance by a wingnut 25 on the threaded bolt 26, which connects the two parts of the handle (Fig. 6).

By reason of the construction described, it will be manifest that by arranging the weights 3 and a so that they pass each other at the ends of that diameter which is at right angles to the handle 2, the weights will give the shell 13 a vibrating motion in the direction of the length of the handle 2, but not in the direct-ion at right angles to the handle, because in the latter direction the kinetic energies of the swinging masses neutralize each other.

Having thus described our invention what we claim as new, and wish to secure by Letters Patent, is:

1. In a massage device, the combination of a handle, a shell carried by and extending beyond one end of the handle, suitably supported weights revoluble in arallel planes within the shell, means for simultaneously revolving the weights in opposite directions, and means on the shell for utilizing the vibrating motion thereof on a spot to be treated.

2. An apparatus for mechanical massage comprising a handle, a fixed shaft at the end of the handle and at right an les thereto, two weights pivoted on the shaft with their center of gravity outside the shaft a bevel wheel on that part of each weight, which surrounds the shaft a third bevel wheel between the said bevel-wheels and engaging both these, a rotatable shaft inside the handle, on which shaft the third bevel wheel is fixed, a worm at the rear end of said shaft, a wormwheel engaging said worm and a crank to revolve the wormwheel.

3. In an apparatus for mechanical massage the combination with a handle and a fixedshaft at the end of the handle at right angles thereto, of two weights pivoted on the shaft, bevel gears to swing the weights around the shaft arranged so that the weights in revolving always pass each other at the ends of that diameter of their revolving circle, which is at right angles to the handle, a cylindrical shell covering the two weights and fixed to the handle, an arm projecting from the shell in a plane parallel with the revolving planes of the weights, a ball at the outer end of said arm, and means to fix the arm in any arbitrary inclination to the handle between 90 and 180 degrees.

4. In an apparatus for mechanical massage the combination with a handle and a fixed shaft at right angles to the handle, of two weights, turnable around the shaft so as to pass each other always at distinct points of their revolving circle, means for revolving the weights, a cylindrical shell covering the weights, an arm projecting from said shell and provided at the outer end with a ball, a slit in the cylindrical surface of the shell in a plane parallel with the revolving planes of the weights, the inner end of the arm penetrating said slit, a head on the arm inside the shell and a wing nut outside the same for the purpose to fix the arm in arbitrary inclination to the handle.

5. In an apparatus for mechanical massage the combination with a handle and a fixed shaft at right angles to the handle, of two weights pivoted on the shaft, means for swinging the weights around the shaft, a cylindrical shell covering the weights, an arm projecting from the shell and provided at the outer end with a ball, two arms projecting in opposite directions from the hub of each weight, the one arm being angular in section and extending through a correspondingly shaped hole in one weight, a spiral spring around the other arm, and a bracket fixed on the weight on which bracket as well as 011 the hub of the weight the spiral spring acts, for the purpose described.

6. In an apparatus for mechanical massage the combination with a fixed shaft, of two weights pivoted on the shaft, means for swinging the weights in opposite directions, a cylindrical shell covering the weights, means to transmit the vibrating motion from the shell to the spot of the human body to be treated, a handle, on which the devices are mounted, the lower part of said handle loosely fixed to the other part, means to incline said lower part in regard to the other part and means to secure said lower part in the inclination wanted for the purpose described.

7. In a massage device, the combination of a handle, a shell carried by and extending beyond one end of the handle, suitably supported weights revoluble in parallel planes within the shell, means for simultaneously revolving the weights in opposite directions, means on the shell for utilizing the vibrating motion thereof on a spot to be treated; said means being adjustable from a position at right angles to the handle to a position in line with said handle, and means for adjustably fixing said means with respect to the shell.

In testimony whereof we have hereunto set our hands in presence of two subscribing witnesses.

HENRIK WIKING. BROR JOHANNES BENGTSSON.

VVit-nesses A. KIEL, Euro WIDHAI-IN. 

